Definition

1. Noun:
   • A horizontal barrier in a wall: A damp-proof course is a continuous layer or strip of impermeable material built into the walls of a building, just above ground level. Its primary function is to prevent ground moisture from rising up through the porous structure of the walls by capillary action, a process known as "rising damp."

Usage

• Noun:
  • The surveyor recommended installing a new damp-proof course to solve the persistent moisture problem in the basement walls.
  • Older houses often lack a proper damp-proof course, making them more susceptible to dampness and mold.

Advanced Usage

• "To install/retrofit a damp-proof course": This phrase describes the action of adding this barrier to an existing building.
  • The renovation project included retrofitting a chemical damp-proof course to protect the historic brickwork.

Variants and Related Words

• Damp proofing (n): The general process or treatment used to prevent moisture penetration.
  • The contractor specializes in basement damp proofing.
• DPC (n): A common abbreviation for "damp-proof course."
  • The architect's plans specify a DPC at 150mm above external ground level.

Synonyms

• Moisture barrier: A general term for any material that blocks the passage of water or vapor.
• Damp barrier: A less technical synonym with the same meaning.

Related Phrases

• Rising damp: The specific problem that a damp-proof course is designed to prevent.
  • The telltale signs of rising damp were evident below the level of the failed damp-proof course.

Noun

1. a course of some impermeable material laid in the foundation walls of building near the ground to prevent dampness from rising into the building